TWI706871B - Tire pressure detector with center of gravity shift - Google Patents

Abstract

A tire pressure detector with center of gravity shift is applied to a wheel having a rim and a tire with an air pressure spaced formed therebetween and an air tap connected with the pressure space. The tire pressure detector includes a main body and a detection module. The main body is movable disposed in the air pressure space and provided with a housing space, a geometric center, and a gravity center, wherein the position of the geometric center is different from the gravity center. The detection module is disposed in the housing space for detecting the air pressure in the air pressure space. Therefore, the stability of the main body is maintained, such that the transmission antenna permanently faces a fixed direction for keeping a stable strength of the signal. Also, the present invention is easily installed without additional tools.

Description

Tire pressure detector with center of gravity deviation

The present invention relates to a tire pressure detection related field for wheels, especially a tire pressure detector with a center of gravity deviation.

Press, the tire pressure detection system is an electronic system installed on the wheels to detect whether the tire pressure is sufficient. This system will detect in real time, and use meters, digital displays or simply to use lights or sounds for driving People learn about changes in tire pressure to reduce traffic accidents caused by excessive or insufficient tire pressure.

The tire pressure detection system can be divided into indirect and direct according to the mode of operation. Among them, the indirect tire pressure detection system does not directly detect the tire pressure of the tires, but detects the speed of the wheels. If the system detects that the speed of a wheel is too far apart from the speed of other wheels, there may be tires. If the pressure is abnormal, the driver will be alerted, but the indirect tire pressure detection system cannot provide the driver with the actual tire pressure value.

Moreover, the direct tire pressure detection system, which has a sensor with signal transmission function, can provide the actual tire pressure value of the driver's wheel. Among them, there are two types of tires outside the tires and in-tire tires according to the installation method. The external sensor is attached to the air nozzle of the wheel and can be easily installed by the car owner. However, due to the weight of the sensor itself, locking on the air nozzle will cause uneven distribution of the wheel mass, which will affect the wheel balance and inject air When the sensor needs to be disassembled, there is a risk of damage to the sensor.

In addition, when the rubber valve is combined with the tire sensor, there will be a shaking phenomenon when the vehicle is traveling, and the rubber body of the rubber valve may be broken after long-term operation. In addition, the in-tire sensor is installed in the rim of the wheel, and the tire needs to be disassembled for installation. Because it is generally a fixed tire pressure sensor, the air valve needs to be locked on the rim for installation. From time to time, technicians are often careless in construction, causing the tire skin or tools to be dismantled to directly hit the valve or sensor, causing the valve to break or the sensor to be damaged, resulting in additional costs to the merchant.

In order to solve the above problems, the present invention provides a tire pressure detector with a center of gravity offset. When the wheel is traveling and the body moves in the tire, the center of gravity of the body is used to offset the geometric center of the shape, so that the body can maintain balance and stability. Roll along with the wheels; thereby, the transmission effect of the wireless transmission unit is stable and can be installed without using any tools, achieving convenient installation.

An embodiment of the present invention provides a tire pressure detector with a center of gravity deviation, which is used for a wheel, the wheel has a rim and a tire sleeved on the rim, and an air pressure space is formed between the tire and the rim. The rim is provided with an air nozzle that communicates with the air pressure space. The tire pressure detector includes: a body, the outer edge of which is one of a sphere, an ellipsoid or a rugby body, the body is movably arranged in the air pressure space, and a housing is provided in the body Space, the body has a passage through which is connected to the air pressure space. The body has a geometric center of shape and a center of mass. The position of the geometric center of the shape is different from the position of the center of mass. The center of mass is between the geometric center of the shape and the body. Between the outer edges, the channel is far away from the center of mass; and a detection module, which is arranged in the accommodating space. The detection module has a sensing unit, a central processing unit, a wireless transmission unit, and a power supply unit coupled to each other The power unit, the sensing unit detects the gas pressure in the air pressure space through the channel and generates a pressure signal. The central processing unit receives the pressure signal and transmits the pressure signal to the wireless transmission unit. Wireless transmission.

Based on the above, the present invention places the body with the detection module in the air pressure space. When the wheels are moving, since the center of gravity of the body shifts from the geometric center of the shape, the body can be kept in a balanced and stable state and avoid the body from following The wheel rotates and rolls randomly, causing damage to the body.

Moreover, during the rotation of the main body, the gas pressure in the air pressure space is detected by the detection module. Therefore, there is no need to fix it on the wheel additionally, achieving the convenience of quick and easy installation.

Furthermore, the tire pressure detector of the present invention only needs to be placed in the air pressure space between the tire and the rim, and there is no need to match the wheel specifications or the position of the air nozzle. When the conventional sensor is installed, it is easy to cause the sensor or The problem of air nozzle damage; therefore, the present invention is applicable to any wheel, and is not restricted by the specifications of the model and style, thereby increasing the scope of use of the present invention.

In addition, when the wheel is moving, since the center of mass of the body shifts from the geometric center of the shape, the normality of the channel of the body can be maintained toward the wheel axis, preventing the channel from being blocked, resulting in the accuracy of the gas pressure measurement by the detection module.

1: wheel

2: Wheels

3: tires

4: Outer surface

5: Outer periphery

6: Tread

7: Inner tread

16: curved edge

17: plane

18: Channel

20: Detection module

21: Sensing unit

22: Circuit board

221: first side

8: Air pressure space

9: Gas mouth

100: Tire pressure detector

10: body

11: Housing space

12: geometric center of shape

13: Quality center of gravity

14: The first axis

15: second axis

222: second side

23: Central Processing Unit

24: wireless transmission unit

241: The first antenna part

242: second antenna part

25: Power unit

26: counterweight unit

30: Filler

Fig. 1 is a schematic cross-sectional view (1) of the tire pressure detector according to the first embodiment of the present invention, showing that the outer edge of the body is a sphere without a counterweight unit.

2 is a schematic cross-sectional view (2) of the tire pressure detector according to the first embodiment of the present invention, showing that the outer edge of the body is a sphere and is provided with a counterweight unit.

Fig. 3 is a schematic cross-sectional view (1) of the tire pressure detector of the second embodiment of the present invention, showing that the outer edge of the body is an ellipsoid without a counterweight unit.

4 is a schematic cross-sectional view (2) of the tire pressure detector of the second embodiment of the present invention, showing that the outer edge of the body is an ellipsoid and is provided with a counterweight unit.

5 is a schematic cross-sectional view (1) of the tire pressure detector according to the third embodiment of the present invention, showing that the outer edge of the body has a flat surface and is not provided with a counterweight unit.

6 is a schematic cross-sectional view (2) of the tire pressure detector of the third embodiment of the present invention, showing that the outer edge of the body has a flat surface and is provided with a counterweight unit.

Fig. 7 is a schematic diagram of an embodiment of the present invention where the body is arranged on a wheel.

Fig. 8 is a schematic cross-sectional view of an embodiment of the body of the present invention rolling in the air pressure space of the wheel.

Figure 9 is a schematic diagram of an embodiment of the present invention's body swing stability.

In order to facilitate the description of the central idea of the present invention expressed in the column of the above-mentioned summary of the invention, specific embodiments are used to express it. The various objects in the embodiment are drawn according to the proportion, size, deformation or displacement suitable for illustration, rather than drawn according to the actual component ratio.

The singular forms "一", "one" and "the" used in this article also include plural forms, unless the context clearly indicates otherwise. Furthermore, it should be understood that when used in this specification, the terms "including" and/or "including" designate the presence of the features, bodies, modules, and/or units, but do not exclude the presence or addition of one or more other features, Body, module and/or unit.

When it is mentioned that a component is "on" or "on" another component, or that a component is "connected", "coupled" or "connected" with another component, it can be directly disposed on, coupled, connected or It is connected to another element or there is an intermediate element.

Please refer to Figures 1 to 9, the present invention provides a tire pressure detection with a center of gravity offset The detector 100 is used in a wheel 1 of a vehicle. The vehicle can be one of a locomotive and an automobile. In the embodiment of the present invention, the vehicle is an automobile. The wheel 1 has a rim 2 and a tire 3 sleeved on the rim 2. The rim 2 has an outer surface 4 and an outer peripheral edge 5. The outer surface 4 faces one end of the axis of rotation of the wheel 1, and the outer peripheral edge 5 surrounds the wheel 1 The rotation axis is set, and the tire 3 has an outer tread 6 and an inner tread 7, wherein the inner tread 7 of the tire 3 is sleeved on the rim 2 facing the outer periphery 5 of the rim 2, and the inner tread 7 of the tire 3 and the rim 2 An air pressure space 8 is formed between the outer periphery 5, and when the vehicle is traveling, the outer tread 6 of the tire 3 is in contact with the ground; in addition, the outer surface 4 of the rim 2 is provided with an air nozzle 9 connected to the air pressure space 8 , Among them, the gas nozzle 9 provides gas input pressure space 8.

The tire pressure detector 100 of the present invention includes: a main body 10 and a detection module 20. The detection module 20 is arranged in an accommodating space 11 inside the main body 10, wherein the main body 10 is movably arranged in the air pressure space 8 , Used to balance the mass of the wheel 1, and detect the gas pressure in the air pressure space 8 through a sensing unit 21 of the detection module 20, thereby achieving the effect of balancing the wheel 1 and detecting the tire pressure at the same time .

The body 10 has a shape geometric center 12 and a mass center of gravity 13, the position of the shape geometric center 12 is different from the position of the mass center of gravity 13, and the mass center of gravity 13 is between the shape geometric center 12 and the outer edge of the body 10. The outer edge will be in contact with the inner tread 7 of the tire 3. It is further explained that the position of the mass center of gravity 13 on the body 10 is lower than the position of the geometric center of the shape 12 on the body 10. Therefore, when the body 10 is at rest, the center of mass 13 is The position is normally lower than the position of the geometric center 12 of the shape, and is located in the direction of gravity of the body 10.

Furthermore, the main body 10 has a first axis 14 and a second axis 15 perpendicular to the first axis 14; the outer edge of the main body 10 can be one of a sphere, an ellipsoid, a rugby ball or a cylinder; please refer to As shown in Figures 1 and 2, in the first embodiment of the present invention, the outer edge of the body 10 is a sphere, the length of the first shaft 14 is equal to the length of the second shaft 15, and the boundary between the first shaft 14 and the second shaft 15 Is the center of the body 10, and the shape is geometric The center 12 is the center of the body 10, and the mass center of gravity 13 is relatively located on the second axis 15 and lower than the position of the geometric center 12 on the second axis 15.

3 and 4, in the second embodiment of the present invention, the outer edge of the body 10 is an ellipsoid, wherein the length of the first shaft 14 is greater than the length of the second shaft 15, and the geometric center 12 of the shape is located at the first At the junction of the shaft 14 and the second shaft 15, the mass center of gravity 13 is relatively located on the second shaft 15 and lower than the position of the geometric center 12 of the shape on the second shaft 15.

Please refer to Figures 5 and 6, in the third embodiment of the present invention, the outer edge of the main body 10 is formed by an arc-shaped side 16 connected to a flat surface 17, and the outer edge of the main body 10 is viewed in cross-section. The two ends are connected on both sides of the plane 17; the length of the first shaft 14 is greater than the length of the second shaft 15, the geometric center 12 of the shape is located at the junction of the first shaft 14 and the second shaft 15, and the center of mass 13 is located on the second On the axis 15 and between the geometric center 12 of the shape and the plane 17.

In addition, in each embodiment of the present invention, the main body 10 is a housing, and the detection module 20 is directly disposed in the accommodating space 11 of the main body 10, wherein the main body 10 is provided with a channel 18 which is away from the center of mass 13 and the first The two shafts 15 and the channel 18 communicate with the air pressure space 8 and are connected to the sensing unit 21. The detection module 20 is fixed in the accommodating space 11 of the body 10 by a filler 30, which fills the accommodating space 11, The sensing unit 21 detects the gas pressure of the air pressure space 8 through the channel 18, wherein the filling member 30 can be plastic or rubber, such as polyamide fiber (PA), polybutylene terephathalate, PBT) PBT, etc., rubber such as silicone, EPDM (Ethylene Propylene Diene Monomer, EPDM), etc.

The detection module 20 has a circuit board 22, a central processing unit 23, a wireless transmission unit 24, and a power unit 25 for supplying power. In the embodiment of the present invention, the sensing unit 21, the central processing unit 23 and the wireless transmission unit 24 are coupled to each other and integrated into one body; among them, the wireless The transmission unit 24 is a radio frequency antenna, where the radio frequency antenna can be sub-1GHz, that is, the frequency of the radio frequency antenna is lower than 1GHz, for example: 315MHz, 434MHz, 868MHz or 915MHz and other frequency bands, in addition to the frequency 2.4GMHz, In the embodiment of the present invention, the wireless transmission unit 24 has a first antenna portion 241 and a second antenna portion 242, and the first antenna portion 241 and the second antenna portion 242 are connected in a twisted manner. Therefore, the wireless transmission unit of the present invention The transmission unit 24 is non-directional, so when the main body 10 rolls with the wheel 1, the wireless transmission unit 24 can still stably transmit the pressure signal generated by the sensing unit 21 to the central processing unit 23; the power unit 25 is a button type The battery, power unit 25 is arranged along the second axis 15.

When the sensing unit 21 detects the gas pressure in the air pressure space 8 through the channel 18, the sensing unit 21 generates a pressure signal and transmits the pressure signal to the central processing unit 23, and the central processing unit 23 receives the pressure signal and borrows The pressure signal is transmitted wirelessly by the wireless transmission unit 24, and the wireless transmission unit 24 can be wirelessly connected with the engine control unit (ECU) of the vehicle. When the electronic control unit receives the pressure signal, the pressure Display of gas pressure in space 8, or issue a warning signal when the gas pressure in space 8 is abnormal, to remind the driver. Among them, the electronic control unit can be a prompt interface of one of instrument, digital display, light or sound .

Furthermore, the circuit substrate 22 has a first surface 221 and a second surface 222 relatively far away from each other. The sensing unit 21, the central processing unit 23 and the wireless transmission unit 24 are disposed on the first surface 221 of the circuit substrate 22, and the power unit 25 is arranged on the second surface 222 of the circuit board 22, wherein the arrangement direction of the circuit board 22 is parallel to the first axis 14 or the second axis 15.

In the first, second and third embodiments of the present invention, please refer to Figure 1 Figure 3 and Figure 5, the total weight of the sensing unit 21, the central processing unit 23 and the wireless transmission unit 24 is less than the weight of the power unit 25 In the embodiment of the present invention, the arrangement direction of the circuit substrate 22 is parallel to the first axis 14, wherein the first surface 221 and the second surface 222 of the circuit substrate 22 are relatively parallel to the first axis 14, and the first surface of the circuit substrate 22 surface 221 is offset from the first shaft 14; thereby, the weight of the power unit 25 is used to offset the center of mass 13 of the body 10 from the geometric center 12 of the shape.

In the first, second and third embodiments of the present invention, please refer to FIG. 2, FIG. 4 and FIG. 6, the detection module 20 is further provided with a counterweight unit 26, which is connected to the power unit 25 , The weight of the power unit 25 is increased by the counterweight unit 26, so that the total weight of the central processing unit 23 and the wireless transmission unit 24 is less than the total weight of the power unit 25 and the counterweight unit 26, wherein the counterweight unit 26 can be a metal block , Rubber blocks or other material blocks, and the purpose of the counterweight unit 26 is to increase the weight of the body 10 so that the center of mass 13 of the body 10 is offset from the geometric center 12 of the shape.

Please refer to Figures 7-9, the body 10 with the detection module 20 is placed in the air pressure space 8. When the wheel 1 rotates to drive the vehicle to move, the centrifugal force of the wheel 1 rotates, the body 10 follows the wheel 1. Moving, since the center of mass 13 of the body 10 is lower than the geometric center 12 of the shape, when the body 10 is affected by external forces, the body 10 will form a tumbler-like reciprocating sway, and the body 10 will not move in any direction in a dynamic balance manner Scroll, so that the pointing position of the wireless transmission unit 24 can be kept facing the same direction, so that the signal transmission of the wireless transmission unit 24 is not disturbed and the transmission effect is continuous and uninterrupted.

Furthermore, in the third embodiment of the present invention, when the main body 10 is placed in the air pressure space 8, the flat surface 17 of the main body 10 will contact the inner tread 7 to keep the main body 10 from rolling in any direction and increase the stability of the main body 10 , So that the direction of the wireless transmission unit 24 can be kept facing the same direction, so that the signal transmission of the wireless transmission unit 24 is not interfered, the transmission effect is continuous and uninterrupted, and the signal strength is stabilized.

In addition, during the rotation of the main body 10, the gas pressure in the air pressure space 8 is detected by the detection module 20. Therefore, there is no need to additionally fix on the wheel 1 to cause complicated installation procedures; thereby, quick and easy installation is achieved. Convenience. In addition, the number of tire pressure detectors 100 of the present invention can be one or more, and the user can adjust the number of tire pressure detectors 100 according to requirements or vehicle types. Wherein, when the number of the tire pressure detector 100 is plural, the outer shell of the tire pressure detector 100 is a sphere; therefore, when the wheel 1 rotates to drive the vehicle to move, the body 10 is in rolling contact with the inner tread 7 of the tire 3 , And then use dynamic balance to offset the unbalanced vibration caused by the wheel 1 and the wheel assembly, and the mass of the wheel 1, thereby offset the unbalanced vibration caused by the wheel 1 and the wheel assembly, to balance the mass of the wheel 1 and reduce the vibration of the wheel 1 In this way, the wheel 1 is balanced and has the function of detecting tire pressure.

It should also be noted that, in order to further achieve the function of balancing the tire 3 and saving costs, the present invention can also incorporate a single tire pressure detector 100 with a plurality of balance bodies (not shown) in the air pressure space 8. Each balance body can be in the shape of a sphere, and the principle of dynamic balance can be used to make the wheel 1 rotate to achieve a stable effect.

The above-mentioned embodiments are only used to illustrate the present invention, and are not used to limit the scope of the present invention. All modifications or changes made without violating the spirit of the present invention belong to the scope of the present invention.

100: Tire pressure detector

10: body

11: Housing space

12: geometric center of shape

13: Quality center of gravity

14: The first axis

15: second axis

18: Channel

20: Detection module

21: Sensing unit

22: Circuit board

221: first side

222: second side

23: Central Processing Unit

24: wireless transmission unit

241: The first antenna part

242: second antenna part

25: Power unit

30: Filler

Claims (5)

A tire pressure detector with an offset of the center of gravity is used for a wheel, the wheel has a rim and a tire sleeved on the rim, an air pressure space is formed between the tire and the rim, and the tire pressure detection The measuring device includes: a body whose outer edge is one of a sphere, an ellipsoid or a rugby ball, the body having a first axis and a second axis perpendicular to the first axis, and the body is movably set at the air pressure The main body is provided with an accommodating space, the main body has a passage through it, and the passage communicates with the air pressure space, wherein the main body has a shape geometric center and a mass center of gravity, and the position of the shape geometric center is different from the The position of the center of mass, the center of mass is between the geometric center of the shape and the outer edge of the body, the axis of the channel is not coaxial with the second axis, and the axis of the channel does not pass through the geometric center of the shape and the mass Center of gravity; and a detection module, which is set in the accommodating space, the detection module has a sensing unit, a central processing unit, a wireless transmission unit and a power unit for supplying power, the The wireless transmission unit has a first antenna portion and a second antenna portion, the first antenna portion and the second antenna portion are connected in a turning manner; the sensing unit detects the gas pressure in the air pressure space through the channel A pressure signal is generated, and the central processing unit receives the pressure signal and transmits the pressure signal wirelessly to the outside through the wireless transmission unit. The tire pressure detector with the offset of the center of gravity according to claim 1, wherein the detection module further has a circuit board, the circuit board has a first surface and a second surface arranged oppositely, the sensor The measuring unit, the central processing unit and the wireless transmission unit are arranged on the first surface of the circuit substrate, and the power unit is arranged on the second surface of the circuit substrate. The tire pressure detector with a center of gravity deviation as described in claim 2, wherein the sensing unit The total weight of the yuan, the central processing unit and the wireless transmission unit is less than the weight of the power unit. The tire pressure detector with a center of gravity offset according to claim 2, wherein the detection module is further provided with a counterweight unit, and the counterweight unit is connected with the power unit. The tire pressure detector with a center of gravity offset according to claim 1, wherein the geometric center of the shape is located at the junction of the first axis and the second axis, the center of mass is located at the second axis, and the power unit is located along the The second shaft is arranged, and the channel is away from the second shaft.

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